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Northwest Africa 14993
Basic information Name: Northwest Africa 14993
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14993
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 174 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Achondrite-ung
Recommended:  Achondrite-ung    [explanation]

This is 1 of 149 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 20 Dec 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14993 (NWA 14993)

(Northwest Africa)

Purchased: 2022

Classification: Ungrouped achondrite

History: Purchased by Ziyao Wang in 2022 from a Northwest Africa meteorite dealer.

Physical characteristics: Single stone with patches of black fusion crust. The exposed interior is a fragmental breccia with coarse light-green to cream-colored grains. Scattered oxidized metal grains are visible throughout.

Petrography: (A. Ross and C. Agee, UNM) Reflected light microscopy images give the approximate modal abundances: 80% olivine, 15% pyroxene, 1-2% troilite, with minor chromite, taenite, kamacite, silica, and schreibersite. No plagioclase detected.

Geochemistry: (A. Ross, UNM) Olivine Fa22.2±20.1, range Fa5.0-Fa81.8, Fe/Mn=44±7, n=13; low-Ca pyroxene Fs27.4±19.0Wo4.4±2.4, Fe/Mn=29±3, n=7; augite Fs7.9Wo42.9, Fe/Mn=17, n=1.

Classification: Ungrouped achondrite, peridotite breccia. Similar to NWA 12217, possibly paired with NWA 12562, NWA 12319, and NWA 13954.

Specimens: 21.5 g including a probe mount on deposit at UNM, Ziyao Wang holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2022
Mass (g):174
Pieces:1
Class:Achondrite-ung
Shock stage:high
Weathering grade:low
Fayalite (mol%):22.2±20.1
Ferrosilite (mol%):27.4±19.0
Wollastonite (mol%):4.4±2.4
Classifier:C. Agee, UNM
Type spec mass (g):21.5
Type spec location:UNM
Main mass:WangZ
Comments:BAS-34; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Qi Lv      
Ziyao Wang            
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
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Revision
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